Vulnerability Details : CVE-2023-1095
In nf_tables_updtable, if nf_tables_table_enable returns an error, nft_trans_destroy is called to free the transaction object. nft_trans_destroy() calls list_del(), but the transaction was never placed on a list -- the list head is all zeroes, this results in a NULL pointer dereference.
Vulnerability category: Memory Corruption
Exploit prediction scoring system (EPSS) score for CVE-2023-1095
Probability of exploitation activity in the next 30 days: 0.04%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 7 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2023-1095
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST |
CWE ids for CVE-2023-1095
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A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.Assigned by:
- nvd@nist.gov (Primary)
- secalert@redhat.com (Secondary)
References for CVE-2023-1095
-
https://github.com/torvalds/linux/commit/580077855a40741cf511766129702d97ff02f4d9
netfilter: nf_tables: fix null deref due to zeroed list head · torvalds/linux@5800778 · GitHubPatch
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https://bugzilla.redhat.com/show_bug.cgi?id=2173973
2173973 – (CVE-2023-1095) CVE-2023-1095 kernel: netfilter: NULL pointer dereference in nf_tables due to zeroed list headIssue Tracking;Patch;Third Party Advisory
Products affected by CVE-2023-1095
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*